A thermally controlled soil freezing cabinet
Schmertmann, John H.
Technical ReportSummary: Freezing cabinet performance requirements are set up as: one-dimensional heat flow within the sample, control of water access to the sample, proper instrumentation, and adequate cabinet utility. A preliminary freezing cabinet was tested. Its poor thermal performance led to a theoretical investigation of the performance of several cabinets of different designs. The investigation developed the need for additional control of the thermal boundary conditions of the contained sample. A cabinet was designed with the sample surrounded by six controllable heating elements. The cabinet is used in a cold room. The temperature of each element is individually adjusted by a Variac transformer. By matching insulation and sample temperatures, it is possible to greatly reduce heat transfer between the insulation and the sample. Tests have shown that the heat transfer between insulation and sample can be reduced to 1% of the heat leaving the sample. This cabinet provides good thermal control for one-dimensional heat transfer experiments, such as soil freezing. The cabinet also successfully meets the other performance requirements. NOTE: This is large. Allow your browser several minutes to download the file.
U.S. Army Snow, Ice, and Permafrost Research Establishment.Engineer Research and Development Center (U.S.)
Soil freezing; Artificial freezing; Cold chambers; Soils; Soil testing
SIPRE report ; 50.
Approved for public release; distribution is unlimited.